Norway, I believe, has the strictest DD laws in Europe.
From wiki:
0.02%. Punishment depends on the alcohol level. 0.02% (fine, but one may also risk a suspended licence if any aggravated circumstances are present.), 0.05% (fine, suspended sentence and suspended license), 0.10% (fine, suspended or mandatory sentence and suspended license), 0.15% (fine, mandatory sentence and suspended license).
The guidelines state that the fine for an alcohol level of more than 0.05% should be around 1.5 months base salary and usually not lower than 10,000 NOK. For 0.02 to 0.05% the fine is lower.
Prison sentences are usually around three weeks to three months with a maximum of one year. The suspension period varies from less than a year to forever, when license is suspended forever, one may apply to get it back after five years.